tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Declarations of procedures and variables shared between files
3 * in arch/ppc/mm/.
4 *
5 * Derived from arch/ppc/mm/init.c:
6 * Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
7 *
8 * Modifications by Paul Mackerras (PowerMac) (paulus@cs.anu.edu.au)
9 * and Cort Dougan (PReP) (cort@cs.nmt.edu)
10 * Copyright (C) 1996 Paul Mackerras
11 * Amiga/APUS changes by Jesper Skov (jskov@cygnus.co.uk).
12 *
13 * Derived from "arch/i386/mm/init.c"
14 * Copyright (C) 1991, 1992, 1993, 1994 Linus Torvalds
15 *
16 * This program is free software; you can redistribute it and/or
17 * modify it under the terms of the GNU General Public License
18 * as published by the Free Software Foundation; either version
19 * 2 of the License, or (at your option) any later version.
20 *
21 */
22#include <asm/tlbflush.h>
23#include <asm/mmu.h>
24
25#ifdef CONFIG_PPC32
26extern void mapin_ram(void);
27extern int map_page(unsigned long va, phys_addr_t pa, int flags);
28extern void setbat(int index, unsigned long virt, unsigned long phys,
29 unsigned int size, int flags);
30extern void settlbcam(int index, unsigned long virt, phys_addr_t phys,
31 unsigned int size, int flags, unsigned int pid);
32extern void invalidate_tlbcam_entry(int index);
33
34extern int __map_without_bats;
35extern unsigned long ioremap_base;
36extern unsigned int rtas_data, rtas_size;
37
38extern PTE *Hash, *Hash_end;
39extern unsigned long Hash_size, Hash_mask;
40
41extern unsigned int num_tlbcam_entries;
42#endif
43
44extern unsigned long ioremap_bot;
45extern unsigned long __max_low_memory;
46extern unsigned long __initial_memory_limit;
47extern unsigned long total_memory;
48extern unsigned long total_lowmem;
49
50/* ...and now those things that may be slightly different between processor
51 * architectures. -- Dan
52 */
53#if defined(CONFIG_8xx)
54#define flush_HPTE(X, va, pg) _tlbie(va)
55#define MMU_init_hw() do { } while(0)
56#define mmu_mapin_ram() (0UL)
57
58#elif defined(CONFIG_4xx)
59#define flush_HPTE(X, va, pg) _tlbie(va)
60extern void MMU_init_hw(void);
61extern unsigned long mmu_mapin_ram(void);
62
63#elif defined(CONFIG_FSL_BOOKE)
64#define flush_HPTE(X, va, pg) _tlbie(va)
65extern void MMU_init_hw(void);
66extern unsigned long mmu_mapin_ram(void);
67extern void adjust_total_lowmem(void);
68
69#elif defined(CONFIG_PPC32)
70/* anything 32-bit except 4xx or 8xx */
71extern void MMU_init_hw(void);
72extern unsigned long mmu_mapin_ram(void);
73
74/* Be careful....this needs to be updated if we ever encounter 603 SMPs,
75 * which includes all new 82xx processors. We need tlbie/tlbsync here
76 * in that case (I think). -- Dan.
77 */
78static inline void flush_HPTE(unsigned context, unsigned long va,
79 unsigned long pdval)
80{
81 if ((Hash != 0) &&
82 cpu_has_feature(CPU_FTR_HPTE_TABLE))
83 flush_hash_pages(0, va, pdval, 1);
84 else
85 _tlbie(va);
86}
87#else /* CONFIG_PPC64 */
88/* imalloc region types */
89#define IM_REGION_UNUSED 0x1
90#define IM_REGION_SUBSET 0x2
91#define IM_REGION_EXISTS 0x4
92#define IM_REGION_OVERLAP 0x8
93#define IM_REGION_SUPERSET 0x10
94
95extern struct vm_struct * im_get_free_area(unsigned long size);
96extern struct vm_struct * im_get_area(unsigned long v_addr, unsigned long size,
97 int region_type);
98extern void im_free(void *addr);
99#endif